It’s just not a postseason game at Yankee Stadium if there isn’t rain in the forecast.

Tonight’s Game 1 of the World Series could be in jeopardy, as forecasts call for rain, with clearing late tonight.

In the event of a rainout, fans holding tickets for Game 1 would be admitted tomorrow, and Game 2 would be pushed to Friday. It’s expected, in that case, MLB would eliminate the travel day and resume the series as planned on Saturday in Philadelphia.

Already, if the World Series were to go seven games, the season would end on Nov. 5. But an eliminated off day would also play havoc with the Yankees’ hopes of starting CC Sabathia for three games in the series if needed.

The Yankees dodged terrible weather forecasts to play Games 1 and 2 of the AL Championship Series as scheduled at the Stadium, but Game 6 was rained out Saturday.